The four elements of literature usually referred to plot, characters, theme, and language. Plot: refers to the plot development process of the story as the core and main body of the story. Character: refers to the characters with personality characteristics and psychological state that appear in the novel. They are the soul and life of the novel. The main idea, emotion, and values that the novel wants to express are the core and theme of the novel. Language: refers to the language, pronunciation, intonation, grammar, and rhetorical devices used in the novel. These are the style and characteristics of the novel. The five aspects of the literary theory system usually included: 1. Realist literature: emphasizing reality and objectively paying attention to social reality and life experience. 2. Romanticism literature: emphasizing emotions and ideals, pursuing personality and freedom, paying attention to the human heart and spiritual world. 3. Symbolism literature: emphasizing the significance of symbols and symbols to convey emotions and thoughts through symbols. 4. Modern literature: emphasizing contradictions and conflicts, paying attention to the contradictions and pains in the human heart, and paying attention to the nature of society and culture. 5. Postmodern literature: emphasizing nihility and absurdity, criticizing modern society and human beings. Existentialism focuses on the nihility and collapse of human culture and history.